Description:
The PKGBUILD updates the global CFLAGS to include -fPIC -DPIC (which is good), but
unfortunately the Makefile doesn't seem to take the environment variable into account.
Instead the following line changes the Makefile with a sed script to use -fPIC -DPIC,
but doesn't use the CFLAGS environment variable.

The following change does the same, but is a bit clearer IMHO, and does take CFLAGS into account:

diff --git a/PKGBUILD b/PKGBUILD
index ac03405..c6d78ad 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -16,11 +16,9 @@ md5sums=('35222edb86b50a6641352c66fe829b2e')

build() {
cd "${srcdir}/${pkgname}-${pkgver}"
- CFLAGS="${CFLAGS} -fPIC -DPIC"
- sed -i -e 's/^OPT=.*/OPT=-O2 -pipe -fPIC -DPIC/g' Makefile
./update-pciids.sh

- make ZLIB=no PREFIX=/usr SHAREDIR=/usr/share/hwdata MANDIR=/usr/share/man all
+ make OPT="$CFLAGS -fPIC -DPIC" ZLIB=no PREFIX=/usr SHAREDIR=/usr/share/hwdata MANDIR=/usr/share/man all
}

package() {


Additional info:
I looked at the 3.1.7-2 version of the PKGBUILD.


Steps to reproduce:
Compile pciutils with custom CFLAGS in your /etc/makepkg.conf